Fair Anticipatory Scheduling, making mapped executable pages the first class citizen, zone_reclaim() behavorial expectations, MCE ring buffer, RTL8169 related crashes, and a few good hackers

Mild ext4 filesystem corruption, private anonymous mmaps, performance overhead, introducing the initdev patchset, IDE fixes, Performance Counters, Introducing this_cpu_xx operations, converting ftrace syscalls to TRACE_EVENT, the IEEE 802.15.4 stack,…

The Linux Driver Project, Remapping NULL pointers, MCE ring buffer, paravirt operations overhead, Super-H, System 390, Console screen blanking, and kernels listed on kernel.org

Xen, zero page pointers, detailed stack information,  filesystem notification of errors, printk halt delay, and hardware breakpoints

Xen, OOM, DebugFS, Dynamic ftrace support for s390, kprobe-based event tracing, and resetting the TSC

The spirit of the GPL, hacking at mm_struct, retrying core dumps, security, and a generic hashlist implementation

Xen, page allocator sanitization, poisonous hardware, magic sysrq, System Management Interrupts, and Intel Atom CPU support

ARM devicetree support, ftrace, per-BDI flusher threads, and trusted boot technology

Kernel based checkpoint and restart, per-BDI writeback flusher threads, Microblaze MMU support, ARM devicetree support, and Xen

Tracepoints, modules, Machine Check Exceptions, and IO scheduling